The wide peak lapel was a staple of Atlantic City gangsters, and those guys were onto something: The V shape makes you look as though you're in charge, even if you're the new guy. Today's version strikes the same masculine vibe but is slimmer and best served with a narrow tie, small-collar shirt, and simple, classic shoes (like laceless monk-strap loafers). This mod-style Calvin Klein Collection wool suit is the opposite of over-the-top excess but still conveys power.